#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <vector>

using namespace std;


int main()
{
	int a = 10, b = 20, z = 30;
	const int* x = &a;
	int* const y = &b;

	// *x = 20;
	//y = &z;

	return 0;
}